Nokia 9210i Servicehandbuch
PAMS
Technical Documentation
RAE-5
3. RF+System Module KL8
Page 3 – 37
Issue 1 04/02
COBBA_GJP is a combined AUDIO– and RF–codec for phones with serial RF
TxIQ & RxIQ data lines and serial control interface.
TxIQ & RxIQ data lines and serial control interface.
RFI
COBBA_GJP handles the following RFI functions:
– IF receiving with I/Q separation and A/D conversion (RxI, RxQ)
– I– and Q–transmit and D/A conversion (TxI, TxQ)
– transmit power control (TXC) D/A conversion
– Automatic frequency control (AFC) D/A conversion
– IF receiving with I/Q separation and A/D conversion (RxI, RxQ)
– I– and Q–transmit and D/A conversion (TxI, TxQ)
– transmit power control (TXC) D/A conversion
– Automatic frequency control (AFC) D/A conversion
Digital communication between COBBA_GJP and MADLinda is handled by
MADLinda’s SerialMFI block which controls both serial RF TxIQ and RxIQ data
transfer and COBBA’s control interface.
MADLinda’s SerialMFI block which controls both serial RF TxIQ and RxIQ data
transfer and COBBA’s control interface.
Audio
RAE-5* includes both normal phone audio and personal handsfree (PHF) audio
functionality. Handsfree mode is implemented by speaker and normal mode by
earpiece. Speaker and earpiece are not located on the KL8 module. Signals for
speaker and earpiece are passed through the UI connector. Only one high sen-
sitivity microphone will be used for both modes. On the KL8 module there are
contacts pads (P200, P201) where microphone is connected with spring con-
tacts.
functionality. Handsfree mode is implemented by speaker and normal mode by
earpiece. Speaker and earpiece are not located on the KL8 module. Signals for
speaker and earpiece are passed through the UI connector. Only one high sen-
sitivity microphone will be used for both modes. On the KL8 module there are
contacts pads (P200, P201) where microphone is connected with spring con-
tacts.
Analogue to digital conversion (ADC) of RAE-5’s microphone signals and digital
to analogue conversion (DAC) of received audio signals (for speakers) are
done in COBBA_GJP. Input and output signal source selection and gain control
is performed inside the COBBA_GJP according to control messages from
MADLinda. Audio tones are generated and encoded by MADLinda and trans-
mitted to COBBA_GJP for decoding. PCM coded digital audio data is moved
between MADLinda’s DSP and COBBA_GJP through the PCM bus. The audio
functions in COBBA_GJP are controlled through the serial control interface
from MADLinda’s SerialMFI block. DTMF and keypad tones are routed to ear-
piece, while ringer, wav and handsfree audios are routed to handsfree speaker.
to analogue conversion (DAC) of received audio signals (for speakers) are
done in COBBA_GJP. Input and output signal source selection and gain control
is performed inside the COBBA_GJP according to control messages from
MADLinda. Audio tones are generated and encoded by MADLinda and trans-
mitted to COBBA_GJP for decoding. PCM coded digital audio data is moved
between MADLinda’s DSP and COBBA_GJP through the PCM bus. The audio
functions in COBBA_GJP are controlled through the serial control interface
from MADLinda’s SerialMFI block. DTMF and keypad tones are routed to ear-
piece, while ringer, wav and handsfree audios are routed to handsfree speaker.
External audio signals, XMIC and XEAR, come from system connector. XMIC is
connected to COBBA_GJP’s MIC1N and MIC3N inputs through DC blocking
capacitors. Reference for XMIC is SGND. XEAR is connected to COB-
BA_GJP’s HF output through DC blocking capacitors. Reference for XEAR is
GND.
connected to COBBA_GJP’s MIC1N and MIC3N inputs through DC blocking
capacitors. Reference for XMIC is SGND. XEAR is connected to COB-
BA_GJP’s HF output through DC blocking capacitors. Reference for XEAR is
GND.
Audio amplifier IC (N201) is used to amplify the HF output signal of COB-
BA_GJP for the personal hands free speaker. Audio amplifier shut down mode
is controlled with MADLinda’s MPUGenOut0 line. Because HF amplifier is pow-
ered from battery voltage, controlling of shut down is done through pull–down
fet (V200).
BA_GJP for the personal hands free speaker. Audio amplifier shut down mode
is controlled with MADLinda’s MPUGenOut0 line. Because HF amplifier is pow-
ered from battery voltage, controlling of shut down is done through pull–down
fet (V200).
HeadDet and HookDet interrupting inputs in MADLinda are used to detect dif-
ferent audio accessories. EAD A/D input in CCONT is used to detect the re-
moval of accessory during call.
ferent audio accessories. EAD A/D input in CCONT is used to detect the re-
moval of accessory during call.